/**
  ******************************************************************************
  * @file      startup_n32l406x.s
  * @author    
  * @version   
  * @date      
  * @brief    
  *            This module performs:
  *                - Set the initial SP
  *                - Set the initial PC == Reset_Handler,
  *                - Set the vector table entries with the exceptions ISR address
  *                - Configure the system clock 
  *                - Branches to main in the C library (which eventually
  *                  calls main()).
  *            After Reset the Cortex-M4 processor is in Thread mode,
  *            priority is Privileged, and the Stack is set to Main.
  ******************************************************************************
  */

  .syntax unified
  .cpu cortex-m4
  .fpu softvfp
  .thumb

.global g_pfnVectors
.global Default_Handler
.global Reset_Handler

/* start address for the initialization values of the .data section.
defined in linker script */
.word _sidata
/* start address for the .data section. defined in linker script */
.word _sdata
/* end address for the .data section. defined in linker script */
.word _edata
/* start address for the .bss section. defined in linker script */
.word _sbss
/* end address for the .bss section. defined in linker script */
.word _ebss

.equ  BootRAM, 0xF108F85F
/**
 * @brief  This is the code that gets called when the processor first
 *          starts execution following a reset event. Only the absolutely
 *          necessary set is performed, after which the application
 *          supplied main() routine is called.
 * @param  None
 * @retval : None
*/

  .section .text.Reset_Handler
  .weak Reset_Handler
  .type Reset_Handler, %function
Reset_Handler:
  ldr   r0, =_estack
  mov   sp, r0          /* set stack pointer */

/*Check if boot space corresponds to test memory*/
 
    LDR R0,=0x00000004
    LDR R1, [R0]
    LSRS R1, R1, #24
    LDR R2,=0x1F
    CMP R1, R2
    BNE ApplicationStart

 /*SYSCFG clock enable*/

    LDR R0,=0x40021018
    LDR R1,=0x00000001
    STR R1, [R0]

/*Set CFGR1 register with flash memory remap at address 0*/
    LDR R0,=0x40010000
    LDR R1,=0x00000000
    STR R1, [R0]

ApplicationStart:
/* Copy the data segment initializers from flash to SRAM */
  movs r1, #0
  b LoopCopyDataInit

CopyDataInit:
  ldr r3, =_sidata
  ldr r3, [r3, r1]
  str r3, [r0, r1]
  adds r1, r1, #4

LoopCopyDataInit:
  ldr r0, =_sdata
  ldr r3, =_edata
  adds r2, r0, r1
  cmp r2, r3
  bcc CopyDataInit
  ldr r2, =_sbss
  b LoopFillZerobss
/* Zero fill the bss segment. */
FillZerobss:
  movs r3, #0
  str  r3, [r2]
  adds r2, r2, #4


LoopFillZerobss:
  ldr r3, = _ebss
  cmp r2, r3
  bcc FillZerobss

/* Call the clock system intitialization function.*/
    bl  SystemInit
    
/* Call the application's entry point.*/
  bl main
  
LoopForever:
    b LoopForever


.size Reset_Handler, .-Reset_Handler

/**
 * @brief  This is the code that gets called when the processor receives an
 *         unexpected interrupt.  This simply enters an infinite loop, preserving
 *         the system state for examination by a debugger.
 *
 * @param  None
 * @retval : None
*/
    .section .text.Default_Handler,"ax",%progbits
Default_Handler:
Infinite_Loop:
  b Infinite_Loop
  .size Default_Handler, .-Default_Handler
/******************************************************************************
*
* The minimal vector table for a Cortex M4.  Note that the proper constructs
* must be placed on this to ensure that it ends up at physical address
* 0x0000.0000.
*
******************************************************************************/
   .section .isr_vector,"a",%progbits
  .type g_pfnVectors, %object
  .size g_pfnVectors, .-g_pfnVectors


g_pfnVectors:
  .word _estack
  .word Reset_Handler
  .word NMI_Handler
  .word HardFault_Handler
  .word MemManage_Handler
  .word BusFault_Handler
  .word UsageFault_Handler
  .word 0
  .word 0
  .word 0
  .word 0
  .word SVC_Handler
  .word DebugMon_Handler
  .word 0
  .word PendSV_Handler
  .word SysTick_Handler


  .word WWDG_IRQHandler
  .word PVD_IRQHandler
  .word TAMPER_IRQHandler
  .word RTC_WKUP_IRQHandler
  .word FLASH_IRQHandler
  .word RCC_IRQHandler
  .word EXTI0_IRQHandler
  .word EXTI1_IRQHandler
  .word EXTI2_IRQHandler
  .word EXTI3_IRQHandler
  .word EXTI4_IRQHandler
  .word DMA_Channel1_IRQHandler
  .word DMA_Channel2_IRQHandler 
  .word DMA_Channel3_IRQHandler
  .word DMA_Channel4_IRQHandler
  .word DMA_Channel5_IRQHandler
  .word DMA_Channel6_IRQHandler
  .word DMA_Channel7_IRQHandler
  .word DMA_Channel8_IRQHandler    
  .word ADC_IRQHandler
  .word USB_HP_IRQHandler
  .word USB_LP_IRQHandler
  .word COMP_1_2_IRQHandler
  .word EXTI9_5_IRQHandler
  .word TIM1_BRK_IRQHandler
  .word TIM1_UP_IRQHandler
  .word TIM1_TRG_COM_IRQHandler
  .word TIM1_CC_IRQHandler
  .word TIM2_IRQHandler
  .word TIM3_IRQHandler
  .word TIM4_IRQHandler
  .word I2C1_EV_IRQHandler
  .word I2C1_ER_IRQHandler
  .word I2C2_EV_IRQHandler
  .word I2C2_ER_IRQHandler
  .word SPI1_IRQHandler
  .word SPI2_IRQHandler
  .word USART1_IRQHandler
  .word USART2_IRQHandler
  .word USART3_IRQHandler
  .word EXTI15_10_IRQHandler
  .word RTCAlarm_IRQHandler
  .word USBWakeUp_IRQHandler
  .word TIM8_BRK_IRQHandler
  .word TIM8_UP_IRQHandler
  .word TIM8_TRG_COM_IRQHandler
  .word TIM8_CC_IRQHandler
  .word UART4_IRQHandler
  .word UART5_IRQHandler
  .word LPUART_IRQHandler
  .word TIM5_IRQHandler
  .word TIM6_IRQHandler
  .word TIM7_IRQHandler
  .word CAN_TX_IRQHandler         
  .word CAN_RX0_IRQHandler        
  .word CAN_RX1_IRQHandler        
  .word CAN_SCE_IRQHandler        
  .word LPUART_WKUP_IRQHandler    
  .word LPTIM_WKUP_IRQHandler     
  .word LCD_IRQHandler            
  .word SAC_IRQHandler            
  .word MMU_IRQHandler            
  .word TSC_IRQHandler            
  .word RAMC_PERR_IRQHandler      
  .word TIM9_IRQHandler           
  .word UCDR_IRQHandler           
  
/*******************************************************************************
*
* Provide weak aliases for each Exception handler to the Default_Handler.
* As they are weak aliases, any function with the same name will override
* this definition.
*
*******************************************************************************/

  .weak NMI_Handler
  .thumb_set NMI_Handler,Default_Handler

  .weak HardFault_Handler
  .thumb_set HardFault_Handler,Default_Handler

  .weak MemManage_Handler
  .thumb_set MemManage_Handler,Default_Handler

  .weak BusFault_Handler
  .thumb_set BusFault_Handler,Default_Handler

  .weak UsageFault_Handler
  .thumb_set UsageFault_Handler,Default_Handler

  .weak SVC_Handler
  .thumb_set SVC_Handler,Default_Handler

  .weak DebugMon_Handler
  .thumb_set DebugMon_Handler,Default_Handler

  .weak PendSV_Handler
  .thumb_set PendSV_Handler,Default_Handler

  .weak SysTick_Handler
  .thumb_set SysTick_Handler,Default_Handler

  .weak WWDG_IRQHandler
  .thumb_set WWDG_IRQHandler,Default_Handler

  .weak PVD_IRQHandler
  .thumb_set PVD_IRQHandler,Default_Handler
  
  .weak TAMPER_IRQHandler
  .thumb_set TAMPER_IRQHandler,Default_Handler
  
  .weak RTC_WKUP_IRQHandler
  .thumb_set RTC_WKUP_IRQHandler,Default_Handler
  
  .weak FLASH_IRQHandler
  .thumb_set FLASH_IRQHandler,Default_Handler
  
  .weak RCC_IRQHandler
  .thumb_set RCC_IRQHandler,Default_Handler
  
  .weak EXTI0_IRQHandler
  .thumb_set EXTI0_IRQHandler,Default_Handler
  
  .weak EXTI1_IRQHandler
  .thumb_set EXTI1_IRQHandler,Default_Handler
  
  .weak EXTI2_IRQHandler
  .thumb_set EXTI2_IRQHandler,Default_Handler
  
  .weak EXTI3_IRQHandler
  .thumb_set EXTI3_IRQHandler,Default_Handler
  
  .weak EXTI4_IRQHandler
  .thumb_set EXTI4_IRQHandler,Default_Handler
  
  .weak DMA_Channel1_IRQHandler
  .thumb_set DMA_Channel1_IRQHandler,Default_Handler
  
  .weak DMA_Channel2_IRQHandler
  .thumb_set DMA_Channel2_IRQHandler,Default_Handler
   
  .weak DMA_Channel3_IRQHandler
  .thumb_set DMA_Channel3_IRQHandler,Default_Handler
  
  .weak DMA_Channel4_IRQHandler
  .thumb_set DMA_Channel4_IRQHandler,Default_Handler
  
  .weak DMA_Channel5_IRQHandler
  .thumb_set DMA_Channel5_IRQHandler,Default_Handler
  
  .weak DMA_Channel6_IRQHandler
  .thumb_set DMA_Channel6_IRQHandler,Default_Handler
  
  .weak DMA_Channel7_IRQHandler
  .thumb_set DMA_Channel7_IRQHandler,Default_Handler
  
  .weak DMA_Channel8_IRQHandler
  .thumb_set DMA_Channel8_IRQHandler,Default_Handler

  .weak ADC_IRQHandler
  .thumb_set ADC_IRQHandler,Default_Handler
  
  .weak USB_HP_IRQHandler
  .thumb_set USB_HP_IRQHandler,Default_Handler
  
  .weak USB_LP_IRQHandler
  .thumb_set USB_LP_IRQHandler,Default_Handler
  
  .weak COMP_1_2_IRQHandler
  .thumb_set COMP_1_2_IRQHandler,Default_Handler
  
  .weak EXTI9_5_IRQHandler
  .thumb_set EXTI9_5_IRQHandler,Default_Handler
  
  .weak TIM1_BRK_IRQHandler
  .thumb_set TIM1_BRK_IRQHandler,Default_Handler
  
  .weak TIM1_UP_IRQHandler
  .thumb_set TIM1_UP_IRQHandler,Default_Handler
  
  .weak TIM1_TRG_COM_IRQHandler
  .thumb_set TIM1_TRG_COM_IRQHandler,Default_Handler
  
  .weak TIM1_CC_IRQHandler
  .thumb_set TIM1_CC_IRQHandler,Default_Handler
  
  .weak TIM2_IRQHandler
  .thumb_set TIM2_IRQHandler,Default_Handler

  .weak TIM3_IRQHandler
  .thumb_set TIM3_IRQHandler,Default_Handler
  
  .weak TIM4_IRQHandler
  .thumb_set TIM4_IRQHandler,Default_Handler

  .weak I2C1_EV_IRQHandler
  .thumb_set I2C1_EV_IRQHandler,Default_Handler

  .weak I2C1_ER_IRQHandler
  .thumb_set I2C1_ER_IRQHandler,Default_Handler

  .weak I2C2_EV_IRQHandler
  .thumb_set I2C2_EV_IRQHandler,Default_Handler

  .weak I2C2_ER_IRQHandler
  .thumb_set I2C2_ER_IRQHandler,Default_Handler

  .weak SPI1_IRQHandler
  .thumb_set SPI1_IRQHandler,Default_Handler

  .weak SPI2_IRQHandler
  .thumb_set SPI2_IRQHandler,Default_Handler

  .weak USART1_IRQHandler
  .thumb_set USART1_IRQHandler,Default_Handler

  .weak USART2_IRQHandler
  .thumb_set USART2_IRQHandler,Default_Handler

  .weak USART3_IRQHandler
  .thumb_set USART3_IRQHandler,Default_Handler

  .weak EXTI15_10_IRQHandler
  .thumb_set EXTI15_10_IRQHandler,Default_Handler

  .weak RTCAlarm_IRQHandler
  .thumb_set RTCAlarm_IRQHandler,Default_Handler

  .weak USBWakeUp_IRQHandler
  .thumb_set USBWakeUp_IRQHandler,Default_Handler

  .weak TIM8_BRK_IRQHandler
  .thumb_set TIM8_BRK_IRQHandler,Default_Handler

  .weak TIM8_UP_IRQHandler
  .thumb_set TIM8_UP_IRQHandler,Default_Handler

  .weak TIM8_TRG_COM_IRQHandler
  .thumb_set TIM8_TRG_COM_IRQHandler,Default_Handler

  .weak TIM8_CC_IRQHandler
  .thumb_set TIM8_CC_IRQHandler,Default_Handler

  .weak UART4_IRQHandler
  .thumb_set UART4_IRQHandler,Default_Handler

  .weak UART5_IRQHandler
  .thumb_set UART5_IRQHandler,Default_Handler

  .weak LPUART_IRQHandler
  .thumb_set LPUART_IRQHandler,Default_Handler

  .weak TIM5_IRQHandler
  .thumb_set TIM5_IRQHandler,Default_Handler

  .weak TIM6_IRQHandler
  .thumb_set TIM6_IRQHandler,Default_Handler

  .weak TIM7_IRQHandler
  .thumb_set TIM7_IRQHandler,Default_Handler

  .weak CAN_TX_IRQHandler
  .thumb_set CAN_TX_IRQHandler,Default_Handler
  
  .weak CAN_RX0_IRQHandler
  .thumb_set CAN_RX0_IRQHandler,Default_Handler

  .weak CAN_RX1_IRQHandler
  .thumb_set CAN_RX1_IRQHandler,Default_Handler

  .weak CAN_SCE_IRQHandler
  .thumb_set CAN_SCE_IRQHandler,Default_Handler

  .weak LPUART_WKUP_IRQHandler
  .thumb_set LPUART_WKUP_IRQHandler,Default_Handler

  .weak LPTIM_WKUP_IRQHandler
  .thumb_set LPTIM_WKUP_IRQHandler,Default_Handler

  .weak LCD_IRQHandler
  .thumb_set LCD_IRQHandler,Default_Handler

  .weak SAC_IRQHandler
  .thumb_set SAC_IRQHandler,Default_Handler

  .weak MMU_IRQHandler
  .thumb_set MMU_IRQHandler,Default_Handler

  .weak TSC_IRQHandler
  .thumb_set TSC_IRQHandler,Default_Handler

  .weak RAMC_PERR_IRQHandler
  .thumb_set RAMC_PERR_IRQHandler,Default_Handler

  .weak TIM9_IRQHandler
  .thumb_set TIM9_IRQHandler,Default_Handler

  .weak UCDR_IRQHandler
  .thumb_set UCDR_IRQHandler,Default_Handler



